As someone who needs to wear hearing aids, it's somewhat depressing to see hearing loss treated as a joke. Hearing all the little noises of the world as you interact with it is more precious than many people realise.
If you would have phrased this comment as a PSA (I have hearing loss and it's not great, please take care of your ears everyone!), it would have come better off. Your current comment just feels like it's critizing the author for a very minor joke.
On the theme of the article, sound is a great way to understand what is going on, and I really like how you've used it here. I think some people believe that hearing mainly applies to obvious sounds such as speech and music, but it is, as you demonstrate here, an excellent diagnostic tool. I've personally learned that all of the little sounds contribute significantly to ones mental map / model of the world to the extent that I'm prepared to believe that total deafness would be as devastating, in the long term, as total sight loss.
just keep rubbing it in